Spatiotemporal Relationship between Arctic Mid-Ocean Ridge System and Intraplate Seismicity of the European Arctic

2021 ◽  
Author(s):  
Galina N. Antonovskaya ◽  
Irina M. Basakina ◽  
Natalya V. Vaganova ◽  
Natalia K. Kapustian ◽  
Yana V. Konechnaya ◽  
...  
Keyword(s):  
Correlation Coefficients ◽  
Seismic Energy ◽  
The Arctic ◽  
Time Lags ◽  
Novaya Zemlya Archipelago ◽  
Gakkel Ridge ◽  
Novaya Zemlya ◽  
Mid Ocean Ridge ◽  
Ocean Ridge ◽  
Ridge System

Abstract In this article, we investigate the influence of the Arctic mid-ocean ridge system (AMORS), including the Gakkel and Mohns ridges, and the Knipovich ridge–Lena trough (KL) segment, on seismicity of the Novaya Zemlya archipelago area (NZ) and the northernmost margin of the East-European Platform (EEP) for 1980–2019. For each individual area, the annual seismic energy was obtained by adding the energies of all earthquakes. To do this, we have converted various types of magnitude by different seismic networks into moment magnitude Mw. We compiled the updated catalog for the NZ, the northern EEP, and the northern part of the Ural fold belt (UFB). As a result, we constructed time distributions of annual seismic energy releases for each composing ridges of AMORS, NZ, and EEP combined with UFB. A model based on the Elsasser’s one describing the transfer of lithospheric stress disturbances in the horizontal direction was built, and quantitative calculations of the disturbance propagations from AMORS were performed. Results are in good agreement with the annual seismic energy time lags between rifts and NZ and EEP together with the UFB. We calculated correlation coefficients between the seismic energy releases over the time for the structures, enabling identification of the characteristic excitation cycles and estimation of the interval of disturbance transfer from AMORS. As a result, disturbances from the Gakkel ridge appear 3 yr later in NZ, from the KL segment in 4 yr, and from the Mona ridge in 8 yr. For the EEP + UBF combined area, we found the following disturbances spreading lags as 7 yr for the Mona ridge, 4 yr for the KL segment, and 5 yr for the Gakkel ridge. The obtained damping amplitudes of the disturbance spreading from the arctic ridges are sufficient to affect the intraplate seismic activity.

scholarly journals A subduction influence on ocean ridge basalts outside the Pacific subduction shield

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
A. Y. Yang ◽  
C. H. Langmuir ◽  
Y. Cai ◽  
P. Michael ◽  
S. L. Goldstein ◽  
...  
Keyword(s):  
Upper Mantle ◽  
The Arctic ◽  
Mantle Flow ◽  
Mantle Heterogeneity ◽  
Gakkel Ridge ◽  
The Pacific ◽  
Mid Ocean Ridge ◽  
The Pacific Ocean ◽  
Back Arc ◽  
Ocean Ridge

AbstractThe plate tectonic cycle produces chemically distinct mid-ocean ridge basalts and arc volcanics, with the latter enriched in elements such as Ba, Rb, Th, Sr and Pb and depleted in Nb owing to the water-rich flux from the subducted slab. Basalts from back-arc basins, with intermediate compositions, show that such a slab flux can be transported behind the volcanic front of the arc and incorporated into mantle flow. Hence it is puzzling why melts of subduction-modified mantle have rarely been recognized in mid-ocean ridge basalts. Here we report the first mid-ocean ridge basalt samples with distinct arc signatures, akin to back-arc basin basalts, from the Arctic Gakkel Ridge. A new high precision dataset for 576 Gakkel samples suggests a pervasive subduction influence in this region. This influence can also be identified in Atlantic and Indian mid-ocean ridge basalts but is nearly absent in Pacific mid-ocean ridge basalts. Such a hemispheric-scale upper mantle heterogeneity reflects subduction modification of the asthenospheric mantle which is incorporated into mantle flow, and whose geographical distribution is controlled dominantly by a “subduction shield” that has surrounded the Pacific Ocean for 180 Myr. Simple modeling suggests that a slab flux equivalent to ~13% of the output at arcs is incorporated into the convecting upper mantle.

scholarly journals Seismicity of the Arctic mid-ocean Ridge system

Polar Science ◽  
2015 ◽  
Vol 9 (1) ◽  
pp. 146-157 ◽  
Author(s):  
Vera Schlindwein ◽  
Andrea Demuth ◽  
Edith Korger ◽  
Christine Läderach ◽  
Florian Schmid
Keyword(s):  
The Arctic ◽  
Mid Ocean Ridge ◽  
Ocean Ridge ◽  
Ridge System

Focal depths and mechanisms of large earthquakes on the Arctic Mid-Ocean Ridge System

1986 ◽  
Vol 91 (B14) ◽  
pp. 13993 ◽  
Author(s):  
John P. Jemsek ◽  
Eric A. Bergman ◽  
John L. Nabelek ◽  
Sean C. Solomon
Keyword(s):  
The Arctic ◽  
Mid Ocean Ridge ◽  
Ocean Ridge ◽  
Large Earthquakes ◽  
Ridge System

The subduction influence on ocean ridge basalts and its significance

2021 ◽  
Author(s):  
Alexandra Yang Yang ◽  
Charles Langmuir ◽  
Yue Cai ◽  
Steven Goldstein ◽  
Peter Michael ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Upper Mantle ◽  
The Arctic ◽  
Plate Tectonic ◽  
Gakkel Ridge ◽  
The Pacific ◽  
Mid Ocean Ridge ◽  
The Pacific Ocean ◽  
Back Arc ◽  
Ocean Ridge

Abstract The plate tectonic cycle produces chemically distinct mid-ocean ridge basalts (MORB) and arc volcanics, with the latter enriched in fluid-mobile elements and depleted in Nb owing to fluxes from the subducted slab. Basalts from back-arc basins (BABB), with intermediate compositions, show that the subduction flux can escape the arc. Hence it is puzzling why arc signatures have rarely been recognized in MORB. Here we report the first MORB samples with distinct arc signatures, akin to BABB, from the Arctic Gakkel Ridge. A new high precision dataset for 576 Gakkel samples suggests a pervasive subduction influence. This influence can also be identified in Atlantic and Indian MORB with a “BABB filter”, but is nearly absent in Pacific MORB. This global distribution reflects the control of a “subduction shield” that has surrounded the Pacific Ocean for 180Myr. Statistics suggest that a flux equivalent to ~ 13% of output at arcs is incorporated into the convecting upper mantle.

scholarly journals Carbon Fluxes and Primary Magma CO2Contents Along the Global Mid‐Ocean Ridge System

2019 ◽  
Vol 20 (3) ◽  
pp. 1387-1424 ◽  
Author(s):  
Marion Le Voyer ◽  
Erik H. Hauri ◽  
Elizabeth Cottrell ◽  
Katherine A. Kelley ◽  
Vincent J. M. Salters ◽  
...  
Keyword(s):  
Carbon Fluxes ◽  
Primary Magma ◽  
Mid Ocean Ridge ◽  
Ocean Ridge ◽  
Ridge System

scholarly journals Features of creating multi-time thematic animations of the Arctic environment pollution on the example of Novaya Zemlya

2019 ◽  
Vol 1 ◽  
pp. 1-1
Author(s):  
Andrey Medvedev ◽  
Natalia Alekseenko ◽  
Maria Arsentyeva
Keyword(s):  
Time Scales ◽  
Radioactive Contamination ◽  
Arctic Region ◽  
Test Site ◽  
Nuclear Test ◽  
The Arctic ◽  
Novaya Zemlya Archipelago ◽  
Novaya Zemlya ◽  
The Creation ◽  
The Arctic Region

<p><strong>Abstract.</strong> The Arctic region is currently at the next stage of increased interest not only from the Arctic States, but also from the entire world community. The main pollutants in the region are oil and gas products, heavy metals, chemical and radioactive contamination. The Arctic region of the Russian Federation has experienced a strong anthropogenic impact of radionuclides due to the use of nuclear energy. The main source of pollution is nuclear testing. About 132 tests were conducted on Novaya Zemlya, including 87 atmospheric, 3 underwater and 42 underground tests. Another source of radioactive contamination is the operation of the naval and civil nuclear fleet, as well as nuclear power plants (on the Kola Peninsula and in Bilibino). Until 1963, most of the tests were carried out in the atmosphere and under water, but after the signing of the Moscow Treaty on August 5, 1963, which prohibits the testing of nuclear weapons in three environments (under water, in the atmosphere and outer space), all tests were carried out underground, in tunnels and wells.</p><p>The object of research and mapping is the territory of the Novaya Zemlya archipelago and the nuclear test site located on it. On the territory of the nuclear test site constantly there was an assessment of the radioecological situation. The scientific community is interested in the processes taking place on the New Earth. The territory of the archipelago is constantly involved in various Arctic programs aimed at monitoring the level of environmental pollution and reducing the number of sources of pollution.</p><p>The aim of this work is to create multi-time animations of nuclear tests and the results of radionuclide pollution. These animated cartographic images differ not only in their time scales, but also a large set of qualitative and quantitative characteristics that characterize the results of anthropogenic influence.</p><p>As sources for creation of cartographic animations were: field data, remote sensing data (RS), Open sources, marine navigation maps, DEM’s (AsterDem, ArcticDem, GEBCO), meteorological data, thematic maps (including atlases), topographic maps, literary sources. The main part of the information about Novaya Zemlya archipelago was taken from the works of the Arctic marine complex expedition, which are devoted to the nature, history, archeology and culture of the archipelago. To obtain complete information about the explosions and their energy release ranges, additional open sources were used, from which it is possible to learn about the type of explosion, its power and location (geographical coordinates).</p><p>Dynamic geo-imagery was developed and established by the following method: study of object mapping and the collection of primary spatial data – creation script dynamic geo-imagery – the creation of a geodatabase of research – the creation of the thematic maps and layout of geo-imagery in the graphic editor – create animations with different time scales.</p><p>During the creation of cartographic animations based on the collected data, a multi-time multi-scale cartographic animation was developed, which allowed using the original graphical solution to visualize three interconnected time scales, which allowed to visualize the processes of infiltration and propagation of radioactive inert gases.</p>

scholarly journals Complete mitochondrial genome of an Arctic Collared Lemming subspecies endemic to the Novaya Zemlya Archipelago, Russia

2021 ◽  
Vol 40 ◽  
pp. 133-139
Author(s):  
Vitaly M. Spitsyn ◽  
Alexander V. Kondakov ◽  
Elsa Froufe ◽  
Mikhail Y. Gofarov ◽  
André Gomes-Dos-Santos ◽  
...  
Keyword(s):  
Complete Mitochondrial Genome ◽  
Taxonomic Status ◽  
Molecular Data ◽  
The Arctic ◽  
Novaya Zemlya Archipelago ◽  
Novaya Zemlya ◽  
Mtdna Sequence ◽  
Cold Tolerant ◽  
Complete Mitogenome ◽  
Dicrostonyx Torquatus

In this study, we present an announcement of Novaya Zemlya Collared Lemming Dicrostonyx torquatus ungulatus (von Baer, 1841) complete mitogenome. This rodent was described historically as an Arctic Collared Lemming subspecies endemic to Novaya Zemlya (Arctic Russia) but its taxonomic status was unclear due to the lack of available molecular data. Based on a comprehensive mitogenomic phylogeny of the Arctic Collared Lemming, we show that this insular population shares a highly divergent mtDNA sequence (total length 16,341 bp). Hence, it should be considered a valid subspecies of the Arctic Collared Lemming. Our findings support the hypothesis that the Novaya Zemlya Archipelago had served as a cryptic polar refugium for cold-tolerant terrestrial and freshwater taxa since the mid-Pleistocene or even earlier.

Rhabdothermus arcticus gen. nov., sp. nov., a member of the family Thermaceae isolated from a hydrothermal vent chimney in the Soria Moria vent field on the Arctic Mid-Ocean Ridge

2011 ◽  
Vol 61 (9) ◽  
pp. 2197-2204 ◽  
Author(s):  
Bjørn O. Steinsbu ◽  
Brian J. Tindall ◽  
Vigdis L. Torsvik ◽  
Ingunn H. Thorseth ◽  
Frida L. Daae ◽  
...  
Keyword(s):  
The Arctic ◽  
Rrna Gene ◽  
Organic Substrates ◽  
Mid Ocean Ridge ◽  
The Family ◽  
Optimum Ph ◽  
Casamino Acids ◽  
Ocean Ridge ◽  
Complex Organic ◽  
Acetate Butyrate

A novel thermophilic member of the family Thermaceae, designated strain 2M70-1T, was isolated from the wall of an active white smoker chimney collected in the Soria Moria vent field at 71 °N in the Norwegian–Greenland Sea. Cells of the strain were Gram-negative, non-motile rods. Growth was observed at 37–75 °C (optimum 65 °C), at pH 6–8 (optimum pH 7.3) and in 1–5 % (w/v) NaCl (optimum 2.5–3.5 %). The isolate was aerobic but could also grow anaerobically using nitrate or elemental sulfur as electron acceptors. The strain was obligately heterotrophic, growing on complex organic substrates like yeast extract, Casamino acids, tryptone and peptone. Pyruvate, acetate, butyrate, sucrose, rhamnose and maltodextrin were used as complementary substrates. The G+C content of the genomic DNA was 68 mol%. Cells possessed characteristic phospholipids and glycolipids. Major fatty acids constituted saturated and unsaturated iso-branched and saturated anteiso-branched forms. Menaquinone 8 was the sole respiratory lipoquinone. Phylogenetic analysis of 16S rRNA gene sequences placed the strain in the family Thermaceae in the phylum ‘Deinococcus–Thermus’, which is consistent with the chemotaxonomic data. On the basis of phenotypic and phylogenetic data, strain 2M70-1T ( = JCM 15963T  = DSM 22268T) represents the type strain of a novel species of a novel genus, for which the name Rhabdothermus arcticus gen. nov., sp. nov. is proposed.

scholarly journals Benthic Communities on the Mohn’s Treasure Mound: Implications for Management of Seabed Mining in the Arctic Mid-Ocean Ridge

2020 ◽  
Vol 7 ◽  
Author(s):  
Eva Ramirez-Llodra ◽  
Ana Hilario ◽  
Emil Paulsen ◽  
Carolina Ventura Costa ◽  
Torkild Bakken ◽  
...  
Keyword(s):  
Benthic Communities ◽  
The Arctic ◽  
Mid Ocean Ridge ◽  
Ocean Ridge ◽  
Seabed Mining

scholarly journals Simultaneous Leaching of Seafloor Massive Sulfides and Polymetallic Nodules

Minerals ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 482 ◽  
Author(s):  
Przemyslaw Kowalczuk ◽  
Hassan Bouzahzah ◽  
Rolf Kleiv ◽  
Kurt Aasly
Keyword(s):  
Industrial Applications ◽  
The Arctic ◽  
Central Pacific ◽  
Massive Sulfides ◽  
Central Pacific Ocean ◽  
Polymetallic Nodules ◽  
Mid Ocean Ridge ◽  
Different Types ◽  
Loki’S Castle ◽  
Ocean Ridge

Simultaneous leaching of seafloor massive sulfides (SMS) from Loki’s Castle on the Arctic Mid-Ocean Ridge (AMOR) and polymetallic nodules (PN) from Clarion Clipperton Zone (CCZ) of the Central Pacific Ocean was studied. Leaching tests were conducted using sulfuric acid and sodium chloride, at a temperature of 80 °C for 48 h under reflux. The effect of PN-to-SMS ratio was examined. It was shown that simultaneous leaching of two different types of marine resources was possible resulting in high dissolution rates of metals. The proposed process has many advantages as it does not require pyrometallurgical pretreatment, and yields solid products (i.e., silica, barite, elemental sulfur, albite, microcline, muscovite), which might be utilized for various industrial applications.

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